| NOUN | substance | trioxide | an oxide containing three atoms of oxygen in the molecule |
|---|
| Meaning | An oxide containing three atoms of oxygen in the molecule. | |
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| Narrower | arsenic, arsenic trioxide, arsenous anhydride, arsenous oxide, white arsenic, ratsbane | A white powdered poisonous trioxide of arsenic |
| Broader | oxide | Any compound of oxygen with another element or a radical |
| Spanish | trióxido | |
| Catalan | triòxid | |
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